Due Optical Transition Radiation(OTR) is produced by the hot electrons transport through solid targets, region of OTR is have lager radiation angle and optical intensity distribution.

光学渡越辐射（OTR）测量结果显示：OTR是由于超热电子输运穿越固体靶所致，而辐射区域呈圆盘状、有发散角、有光强分布；

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The switching from normal dispersion to anomalous dispersion is obtained by varying the intensity from couple to probe transition.

通过改变耦合到探测跃迁的驱动场强度，可以实现从正常色散到反常色散的转换。

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In a high-intensity optics field, using rotating waves approximation (RWA) and the special transform, the problem of two-level atoms transition attributes to the Hill equation.

在强光信号作用下，经过一定的数学代换后，上能级几率的求解可归结为类希尔方程求解；

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It can be caused by a number of factors, including a rapid increase in the frequency of training, sudden increase in the intensity of training, transition from one training method to another, genetic abnormalities of the knee joint and poor base strength of the quadriceps.

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